Answer to Question #258460 in Physics for lawr

Question #258460

If a car requires 30. seconds to accelerate from zero to 90. kph (km/hr), its average acceleration is, most nearly,

Expert's answer

90 kph is

"v=90\u00b71000\/3600=25\\text{ m\/s}."

The acceleration is the rate of change of velocity:

"a=v\/t=25\/30=0.83\\text{ m\/s}^2."

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